KONNWEI KW331 Battery Tester 6V/12V/24V with Cloud Report, 2.8in LCD & CCA/Alternator Diagnostics

The KONNWEI KW331 is a handheld 6V/12V/24V automotive battery and charging system tester that delivers quick, accurate state-of-charge and state-of-health diagnostics with instant cloud-reporting.

Designed for professional garages and DIY mechanics alike, the KW331 combines a clear 2.8" LCD, robust build materials, and an intelligent testing chip to evaluate battery voltage, charge level, cranking capacity (CCA), and alternator performance. With high-accuracy measurements and built-in safety protections, it simplifies routine maintenance, pre-trip checks, and customer-facing service documentation.

How does the KW331 determine whether a battery needs replacement?

The device calculates both state-of-charge (SOC) and state-of-health (SOH) by measuring voltage, internal resistance, and comparing readings to the battery’s rated CCA and type. It then presents an assessment so you can decide whether to charge, repair, or replace the battery.

• Measures voltage and internal resistance for precise SOH/SOC estimates
• Uses user-entered battery type and CCA for tailored results
• Displays an easy-to-read pass/fail or health percentage on the LCD

What safety features protect me and my vehicle during testing?

The KW331 includes a 4-in-1 protection system that guards against common electrical hazards during battery diagnostics. These safeguards reduce risk to both the user and the tester while preserving the battery and vehicle electronics.

• Reverse polarity protection to prevent damage from incorrect clamps
• Short-circuit and overcurrent cutoffs to stop dangerous currents
• Overvoltage protection to shield sensitive circuitry during charging checks

How do cloud reports and printing work without an app?

After a test, the KW331 generates a QR code on-screen. Scan it with any smartphone camera to open the report in a web browser—no app required. From there you can save data, share links, or print results to customer labels or standard printers.

• Instant QR code for browser viewing and downloading
• Pre-formatted labels and printable reports for service records
• Shareable link makes customer communication and social sharing simple

What battery types and vehicles are supported by this tester?

The KW331 supports common 6V, 12V, and 24V lead-acid battery types used across cars, light trucks, motorcycles, and commercial vehicles. Enter the correct battery standard and CCA value for accurate diagnostics.

• Compatible with 6V, 12V, and 24V lead-acid battery systems
• Works for passenger cars, motorcycles, vans, and many commercial vehicles
• Adjustable settings for battery standard and rated CCA ensure precise results

Who is this for: The KONNWEI KW331 is built for automotive professionals, independent mechanics, fleet managers, and car owners who want dependable, fast battery and charging system diagnostics paired with shareable records. It fits workshop environments where repeatable accuracy, safety protections, and clear documentation speed service and build customer trust.